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TI-99/4 (no A) Transformer Required?

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Will this TI-99/4 accept power from a common 99/4A transformer? Research tells me some do fine while others may be destroyed, due to a differing power arrangement? 















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As noted on my earlier answer, and confirmed by your pictures, yours should not have any issues with the later power supplies. Your machine definitely has the internal DC supply, and that is the discriminator.


The attached picture shows you the type that needs the external DC supply. Note the slide in the cartridge slot. These are the only ones that have issues with the AC supplies. The slide is a volume control slide for the speaker that's under the grille. . .


Early 99_4 Needs External DC Power Supply.jpg

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Posted (edited)

Yours is the normal adapter and it works already.


The other one has 1x big PIN and I blew I my other adapter, but you can make your own

with a Meanwell adapter.  I did a write-up, published in Tijdingen and I think also at AtariAge.












Edited by globeron

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